--  @testpoint:opengauss关键字procedural(非保留)，作为函数名

--关键字不带引号-成功
drop function if exists procedural;
create function procedural(i integer)
returns integer
as $$
begin
    return i+1;
end;
$$ language plpgsql;
/
drop function procedural;
--关键字带双引号-成功
drop function if exists "procedural";
create function "procedural"(i integer)
returns integer
as $$
begin
    return i+1;
end;
$$ language plpgsql;
/
drop function "procedural";
--关键字带单引号-合理报错
drop function if exists 'procedural';
create function 'procedural'(i integer)
returns integer
as $$
begin
    return i+1;
end;
$$ language plpgsql;
/
--关键字带反引号-合理报错
drop function if exists `procedural`;
create function `procedural`(i integer)
returns integer
as $$
begin
    return i+1;
end;
$$ language plpgsql;
/